Hi,
I have a project that uses the ATTiny167. I have 7 input switches. To read the state of the switches I poll them in a loop. To reduce the use of pins on the 167 I use a 74HC165 shift register ic. I tie the inputs of the 165 High, and have the switches connected to GND to take the input Low when activated. In the final application the switches will be located many metres away from this circuitry. What would you wise folk suggest I need as a buffer (if any) to the switched inputs of the 167?
I appreciate any comments / suggestions.
Leigh
I have a project that uses the ATTiny167. I have 7 input switches. To read the state of the switches I poll them in a loop. To reduce the use of pins on the 167 I use a 74HC165 shift register ic. I tie the inputs of the 165 High, and have the switches connected to GND to take the input Low when activated. In the final application the switches will be located many metres away from this circuitry. What would you wise folk suggest I need as a buffer (if any) to the switched inputs of the 167?
I appreciate any comments / suggestions.
Leigh